Development of an Instrument for the Determination of Learning Objects Quality for Students with Visual Impairment Integrating the Services Theory

Author(s):  
Cesar Eduardo Velazquez Amador ◽  
Jaime Munoz Arteaga ◽  
Francisco Alvarez ◽  
Juan Pedro Cardona Salas ◽  
Dolores Torres Soto ◽  
...  
2015 ◽  
Vol 22 (2) ◽  
pp. 142-143
Author(s):  
Cem Ozgonul ◽  
Erdim Sertoglu ◽  
Tarkan Mumcuoglu

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sophie Neuhann ◽  
Anna Schuh ◽  
Daniel Krause ◽  
Raffael Liegl ◽  
Valerie Schmelter ◽  
...  

Abstract Keratoconus is a progressive ectatic corneal disorder, which can result in severe visual impairment. The new ABCD keratoconus classification system allows differentiated description of the disease. Aim of the study was to evaluate the components of this novel staging system (ARC, PRC, thinnest pachymetry) as well as topometric indices, deviation of normality indices, and other parameters in terms of repeatability and reliability. 317 eyes with keratoconus were examined twice with a Scheimpflug device (Pentacam, Oculus). Bland Altman analysis and intraclass correlations were carried out to evaluate the parameters repeatability and reliability. Apart from IHA (ICC = 0.730), all parameters showed excellent reliability (ICC > 0.900). ARC, PRC, thinnest pachymetry, Kmax, CKI, KI, Rmin, and Progression Avg were the best repeatable parameters with relative repeatability values < 2.5%. Other parameters performing well in terms of repeatability were IHD, ISV, IVA, and final D (RR < 13%). Regression analysis revealed consistently high repeatability along all stages of keratoconus for PRC, thinnest pachymetry, and CKI. All parameters of the ABCD staging system showed excellent reliability and repeatability, PRC and thinnest pachymetry even at all stages of keratoconus and can consequently be reliably used in the determination of keratoconus progression.


Author(s):  
Kornelia Czerwińska ◽  
Kamila Miler-Zdanowska

Changes in the ways of performing professional roles of special education teachers entail the need to develop new solutions for academic education for teachers of the visually impaired. The assessment of the content and forms of the previously proposed education for teachers of the visually impaired from the perspective of the usefulness of their professional competencies may be helpful in the determination of the needed directions of changes in this respect. The aim of the article is to describe and analyse the results of comparative research on visual impairment pedagogy graduates educated in the system of 5-year uniform master’s studies and 3-year bachelor’s studies, concerning the course of their educational and professional paths.


Author(s):  
César Eduardo Velázquez Amador ◽  
Juan Pedro Cardona Salas ◽  
Jaime Muñoz Arteaga ◽  
Francisco Javier Álvarez Rodríguez ◽  
María Dolores Torres Soto ◽  
...  

Determining the learning object quality presents a special complication because we must consider the characteristics of a software application and an instructional element; the above is complicated by the inclusion of the disability issue because there are factors that must be considered in a special way. The chapter has the objective of presenting which are the main factors that must be considered when developing learning objects for people with visual impairment. The instruments for determining learning object quality usually only consider the area expert perspective, without considering the user opinion. For the above, it is proposed to integrate aspects of service theory in the quality determination in order to generate learning objects that also provide greater satisfaction of use to the student. The chapter also presents example questions that can be used to assess the proposed quality factors.


1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.


1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.


1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).


1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.


2000 ◽  
Vol 179 ◽  
pp. 205-208
Author(s):  
Pavel Ambrož ◽  
Alfred Schroll

AbstractPrecise measurements of heliographic position of solar filaments were used for determination of the proper motion of solar filaments on the time-scale of days. The filaments have a tendency to make a shaking or waving of the external structure and to make a general movement of whole filament body, coinciding with the transport of the magnetic flux in the photosphere. The velocity scatter of individual measured points is about one order higher than the accuracy of measurements.


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